1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb5ab7e52bdb852f09d90c6a1078fb8e6eb629b360322755573b4217f889e7e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97670541-27ef-43e7-b6f3-f3da487d4a23.json and https://artists.proofprofile.net/proofs/artist/97670541-27ef-43e7-b6f3-f3da487d4a23.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Crossing the Bar "Sunset and Evening Star"
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e31c4e1b7a9e8c070c713e17a17aa695740aa125934f0dc13503cc7ad4deb1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0339805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b6869c9319709a2c7dfd19c43da5759cf0f9951ef6d1609ca8af5291f75f35. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0339808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791f4a7e280a764689916c79b4ba229f3f78ab4ce8a53b6526d94686b8933760. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0339801.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a66d3267d504bce1b4346443e56f5f98fb5bb10d594fc291cae9888a3d0256. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0339802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3765c342c20669fce08348ce5b83a85f3211d782cd3b9d420877a188ba70ab01. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0339807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679dc7d8932f1280d889e43755c75d93d339c38830ee4bc005bbc54bf6376822. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0339812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335f399b01ba394d662c735596016f81307ab55bc29d2a350881736a8d4713ff. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0339814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf5ed96b50d62c94102f11866c9c8f5cfb467824fba028683e65ef00eaa4d93. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0548309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838229a3f037133c1ae70d5cd187832386c0f1386059c2996b3809fbe8944c4a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0548310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e28fe336e2cbd3db7d7945fc1f5873c2feda78766a39058e8fb0aadd331d42c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0548301.
Praise the Lord, O My Soul: Semi-Chorus. O Pray for the Peace of Jerusalem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccac3a90f63018d5b2f80064041df8eaeea71e95579bf88470206ac2f3c1a23. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0548307.
Saint Thomas Choir of Men & Boys, Fifth Avenue, New York
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc81453f826e871a34de043af1bf63011fca55ef50520d1ebddee232956e1f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBC3S1617414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93304834cf39df07c0405bdd87e0269de901884098922cb00a6c40d58d7dbfd. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBC3S1617404.
Psalm 139 - "O Lord Thou Hast Searched Me Out"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f91d5301fb0673b2ae6af4d2ae2ef2c9ed94e6af4c029255e36821616feb51. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711810.
Psalm 49 - "O Hear Ye This, All Ye People"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa484034cd3b50cf3a667b9bf4a248e4c5a4740c46d55b8e40cabec5b6f4ad3df. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106cfe6450a55431e795be042635aad07930a270c5c771834ff32dce3e18f2dd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711830.
Psalm 39 - "I Said I Will Take Heed To My Ways"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d5c4e52cbec72675c8aafae4b043a981086c86642d409ab0f1bad2c975e4ab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711840.
Psalm 150 - "O Praise God In His Holiness"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb81b580292b969a7fbd2ee799a6258ecea5be4c6be76ef251446cad5be9e0be. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115e843fae0261a3c0f236086fe9f563771d1f1a019dac43efb0be4aa9a83014. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03d8ef91595d977a87290e26fe1307f508ef71eb68004f96611fd3fcc3f8e89. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcd7cd80fba6e6d8db994b4982bdfade32fff7f7cc51847928489e8321f7f6c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711900.
Psalm 90 - "Lord Thou Hast Been Our Refuge"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e7376be56b13bf4cf8cbbb8d1cd5b3cb17f10b44e9f7f9c0ce85a7710dc7ed. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:34:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711910.
Psalm 98 - "The Lord Is King, The Earth May be Glad Thereof"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737f9b98e274eaac3b57a53cf43c66cdb1c7be2a696186765daacf9a9d48347e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711930.
Psalm 96 - "O Sing Unto The Lord A New Song"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ef02f5edf85a1daa18ac7027de02c453c6b86613b1beb59483beaf5635c989. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711850.
Psalm 130 - "Out Of The Deep Have I Called Unto Thee"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3183b45dc85d733568aae36a4bd7ab03d961eb8e189303afd7067e6af039f0ae. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350ecd24aca5a969ab805baf992c29f98b94d2175dd8904057b65cdbb7ede532. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077711920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9923fad744638e15048af1792d3ab94e08fdfbcc227ebc87440201a17b30c159. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBGL9401017.
Requiem, Op. 48 (1893 Version): IV. Pie Jesu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c902ffb8a5a6c6257b1b15cb3bab0fdf7d77d3e5fa8ac31f51f10fa4fa62aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8929204.
Creator of the Stars of Night (Arr. John Scott)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656db9836fe2883695c0bdd44ad2bb91ad42d8ea5a4461302886227903e797d4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1645809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569e143b7e743862ca2653e701f59a2ae25430a113b0d374a9a93fdef38c424d. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBC7N1045814.
Requiem, Op. 48 (1893 Version): VII. In paradisum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515190349a4a4709a5d399030c48bb6f2b8581e2446f9de5a12639c2e74a82b6. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8929207.
Lullaby of the most comfortable in the world Cello & Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b6dffdcbba531f7b7074a3dc466d7e13b5e68c86d2806f102cd8276a57e9fe. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRY661440069.